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<a name="1" href="#1">1</a>   <em class="jxr_javadoccomment">/**</em>
<a name="2" href="#2">2</a>   <em class="jxr_javadoccomment"> * Copyright 2010 Nicholas Blair, Eric Dalquist</em>
<a name="3" href="#3">3</a>   <em class="jxr_javadoccomment"> *</em>
<a name="4" href="#4">4</a>   <em class="jxr_javadoccomment"> * Licensed under the Apache License, Version 2.0 (the "License");</em>
<a name="5" href="#5">5</a>   <em class="jxr_javadoccomment"> * you may not use this file except in compliance with the License.</em>
<a name="6" href="#6">6</a>   <em class="jxr_javadoccomment"> * You may obtain a copy of the License at</em>
<a name="7" href="#7">7</a>   <em class="jxr_javadoccomment"> *</em>
<a name="8" href="#8">8</a>   <em class="jxr_javadoccomment"> *   <a href="http://www.apache.org/licenses/LICENSE-2.0" target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.0</a></em>
<a name="9" href="#9">9</a>   <em class="jxr_javadoccomment"> *</em>
<a name="10" href="#10">10</a>  <em class="jxr_javadoccomment"> * Unless required by applicable law or agreed to in writing, software</em>
<a name="11" href="#11">11</a>  <em class="jxr_javadoccomment"> * distributed under the License is distributed on an "AS IS" BASIS,</em>
<a name="12" href="#12">12</a>  <em class="jxr_javadoccomment"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</em>
<a name="13" href="#13">13</a>  <em class="jxr_javadoccomment"> * See the License for the specific language governing permissions and</em>
<a name="14" href="#14">14</a>  <em class="jxr_javadoccomment"> * limitations under the License.</em>
<a name="15" href="#15">15</a>  <em class="jxr_javadoccomment"> */</em>
<a name="16" href="#16">16</a>  
<a name="17" href="#17">17</a>  <strong class="jxr_keyword">package</strong> com.googlecode.ehcache.annotations.key;
<a name="18" href="#18">18</a>  
<a name="19" href="#19">19</a>  <strong class="jxr_keyword">import</strong> java.util.Arrays;
<a name="20" href="#20">20</a>  <strong class="jxr_keyword">import</strong> java.util.Map;
<a name="21" href="#21">21</a>  
<a name="22" href="#22">22</a>  <em class="jxr_javadoccomment">/**</em>
<a name="23" href="#23">23</a>  <em class="jxr_javadoccomment"> * This key generator is a good option for fast but rough comparison of method invocations. The standard Java</em>
<a name="24" href="#24">24</a>  <em class="jxr_javadoccomment"> * hashCode method is used on the arguments to generate identity information. Essentially {@link Arrays#deepHashCode(Object[])}</em>
<a name="25" href="#25">25</a>  <em class="jxr_javadoccomment"> * is used except with a long instead of an int for a hash accumulator to provide a larger key space. This is</em>
<a name="26" href="#26">26</a>  <em class="jxr_javadoccomment"> * not a secure hashing algorithm.</em>
<a name="27" href="#27">27</a>  <em class="jxr_javadoccomment"> * </em>
<a name="28" href="#28">28</a>  <em class="jxr_javadoccomment"> * &lt;table&gt;</em>
<a name="29" href="#29">29</a>  <em class="jxr_javadoccomment"> *  &lt;tr&gt;</em>
<a name="30" href="#30">30</a>  <em class="jxr_javadoccomment"> *      &lt;th&gt;Pros&lt;/th&gt;</em>
<a name="31" href="#31">31</a>  <em class="jxr_javadoccomment"> *      &lt;th&gt;Cons&lt;/th&gt;</em>
<a name="32" href="#32">32</a>  <em class="jxr_javadoccomment"> *  &lt;/tr&gt;</em>
<a name="33" href="#33">33</a>  <em class="jxr_javadoccomment"> *  &lt;tr&gt;</em>
<a name="34" href="#34">34</a>  <em class="jxr_javadoccomment"> *      &lt;td&gt;</em>
<a name="35" href="#35">35</a>  <em class="jxr_javadoccomment"> *          This is the fastest of the included key generation techniques by over 150%</em>
<a name="36" href="#36">36</a>  <em class="jxr_javadoccomment"> *      &lt;/td&gt;</em>
<a name="37" href="#37">37</a>  <em class="jxr_javadoccomment"> *      &lt;td&gt;</em>
<a name="38" href="#38">38</a>  <em class="jxr_javadoccomment"> *          The generated hash code is only a long so the key is only 64bits long. It is possible for different</em>
<a name="39" href="#39">39</a>  <em class="jxr_javadoccomment"> *          arguments to have the same hash code which would result in a key collision.</em>
<a name="40" href="#40">40</a>  <em class="jxr_javadoccomment"> *      &lt;/td&gt;</em>
<a name="41" href="#41">41</a>  <em class="jxr_javadoccomment"> *  &lt;/tr&gt;</em>
<a name="42" href="#42">42</a>  <em class="jxr_javadoccomment"> * &lt;/table&gt;</em>
<a name="43" href="#43">43</a>  <em class="jxr_javadoccomment"> * </em>
<a name="44" href="#44">44</a>  <em class="jxr_javadoccomment"> * @author Eric Dalquist</em>
<a name="45" href="#45">45</a>  <em class="jxr_javadoccomment"> * @version $Revision: 332 $</em>
<a name="46" href="#46">46</a>  <em class="jxr_javadoccomment"> */</em>
<a name="47" href="#47">47</a>  <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../com/googlecode/ehcache/annotations/key/HashCodeCacheKeyGenerator.html">HashCodeCacheKeyGenerator</a> <strong class="jxr_keyword">extends</strong> AbstractCacheKeyGenerator&lt;Long&gt; {
<a name="48" href="#48">48</a>      <em class="jxr_javadoccomment">/**</em>
<a name="49" href="#49">49</a>  <em class="jxr_javadoccomment">     * Name of the bean this generator is registered under using the default constructor.</em>
<a name="50" href="#50">50</a>  <em class="jxr_javadoccomment">     */</em>
<a name="51" href="#51">51</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> String DEFAULT_BEAN_NAME = <span class="jxr_string">"com.googlecode.ehcache.annotations.key.HashCodeCacheKeyGenerator.DEFAULT_BEAN_NAME"</span>;
<a name="52" href="#52">52</a>      
<a name="53" href="#53">53</a>      <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> INITIAL_HASH = 1;
<a name="54" href="#54">54</a>      <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> MULTIPLIER = 31;
<a name="55" href="#55">55</a>      
<a name="56" href="#56">56</a>      <em class="jxr_javadoccomment">/**</em>
<a name="57" href="#57">57</a>  <em class="jxr_javadoccomment">     * @see AbstractCacheKeyGenerator#AbstractCacheKeyGenerator() </em>
<a name="58" href="#58">58</a>  <em class="jxr_javadoccomment">     */</em>
<a name="59" href="#59">59</a>      <strong class="jxr_keyword">public</strong> <a href="../../../../../com/googlecode/ehcache/annotations/key/HashCodeCacheKeyGenerator.html">HashCodeCacheKeyGenerator</a>() {
<a name="60" href="#60">60</a>      }
<a name="61" href="#61">61</a>  
<a name="62" href="#62">62</a>      <em class="jxr_javadoccomment">/**</em>
<a name="63" href="#63">63</a>  <em class="jxr_javadoccomment">     * @see AbstractCacheKeyGenerator#AbstractCacheKeyGenerator(boolean, boolean) </em>
<a name="64" href="#64">64</a>  <em class="jxr_javadoccomment">     */</em>
<a name="65" href="#65">65</a>      <strong class="jxr_keyword">public</strong> <a href="../../../../../com/googlecode/ehcache/annotations/key/HashCodeCacheKeyGenerator.html">HashCodeCacheKeyGenerator</a>(<strong class="jxr_keyword">boolean</strong> includeMethod, <strong class="jxr_keyword">boolean</strong> includeParameterTypes) {
<a name="66" href="#66">66</a>          <strong class="jxr_keyword">super</strong>(includeMethod, includeParameterTypes);
<a name="67" href="#67">67</a>      }
<a name="68" href="#68">68</a>  
<a name="69" href="#69">69</a>  
<a name="70" href="#70">70</a>      @Override
<a name="71" href="#71">71</a>      <strong class="jxr_keyword">public</strong> Long generateKey(Object... data) {
<a name="72" href="#72">72</a>          <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">this</strong>.deepHashCode(data);
<a name="73" href="#73">73</a>      }
<a name="74" href="#74">74</a>  
<a name="75" href="#75">75</a>      <em class="jxr_javadoccomment">/**</em>
<a name="76" href="#76">76</a>  <em class="jxr_javadoccomment">     * @see Arrays#hashCode(long[])</em>
<a name="77" href="#77">77</a>  <em class="jxr_javadoccomment">     */</em>
<a name="78" href="#78">78</a>      <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">long</strong> hashCode(<strong class="jxr_keyword">long</strong> a[]) {
<a name="79" href="#79">79</a>          <strong class="jxr_keyword">if</strong> (a == <strong class="jxr_keyword">null</strong>)
<a name="80" href="#80">80</a>              <strong class="jxr_keyword">return</strong> 0;
<a name="81" href="#81">81</a>  
<a name="82" href="#82">82</a>          <strong class="jxr_keyword">long</strong> result = INITIAL_HASH;
<a name="83" href="#83">83</a>          <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">long</strong> element : a) {
<a name="84" href="#84">84</a>              <strong class="jxr_keyword">int</strong> elementHash = (<strong class="jxr_keyword">int</strong>)(element ^ (element &gt;&gt;&gt; 32));
<a name="85" href="#85">85</a>              result = MULTIPLIER * result + elementHash;
<a name="86" href="#86">86</a>          }
<a name="87" href="#87">87</a>  
<a name="88" href="#88">88</a>          <strong class="jxr_keyword">return</strong> result;
<a name="89" href="#89">89</a>      }
<a name="90" href="#90">90</a>  
<a name="91" href="#91">91</a>      <em class="jxr_javadoccomment">/**</em>
<a name="92" href="#92">92</a>  <em class="jxr_javadoccomment">     * @see Arrays#hashCode(int[])</em>
<a name="93" href="#93">93</a>  <em class="jxr_javadoccomment">     */</em>
<a name="94" href="#94">94</a>      <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">long</strong> hashCode(<strong class="jxr_keyword">int</strong> a[]) {
<a name="95" href="#95">95</a>          <strong class="jxr_keyword">if</strong> (a == <strong class="jxr_keyword">null</strong>)
<a name="96" href="#96">96</a>              <strong class="jxr_keyword">return</strong> 0;
<a name="97" href="#97">97</a>  
<a name="98" href="#98">98</a>          <strong class="jxr_keyword">long</strong> result = INITIAL_HASH;
<a name="99" href="#99">99</a>          <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> element : a)
<a name="100" href="#100">100</a>             result = MULTIPLIER * result + element;
<a name="101" href="#101">101</a> 
<a name="102" href="#102">102</a>         <strong class="jxr_keyword">return</strong> result;
<a name="103" href="#103">103</a>     }
<a name="104" href="#104">104</a> 
<a name="105" href="#105">105</a>     <em class="jxr_javadoccomment">/**</em>
<a name="106" href="#106">106</a> <em class="jxr_javadoccomment">     * @see Arrays#hashCode(short[])</em>
<a name="107" href="#107">107</a> <em class="jxr_javadoccomment">     */</em>
<a name="108" href="#108">108</a>     <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">long</strong> hashCode(<strong class="jxr_keyword">short</strong> a[]) {
<a name="109" href="#109">109</a>         <strong class="jxr_keyword">if</strong> (a == <strong class="jxr_keyword">null</strong>)
<a name="110" href="#110">110</a>             <strong class="jxr_keyword">return</strong> 0;
<a name="111" href="#111">111</a> 
<a name="112" href="#112">112</a>         <strong class="jxr_keyword">long</strong> result = INITIAL_HASH;
<a name="113" href="#113">113</a>         <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">short</strong> element : a)
<a name="114" href="#114">114</a>             result = MULTIPLIER * result + element;
<a name="115" href="#115">115</a> 
<a name="116" href="#116">116</a>         <strong class="jxr_keyword">return</strong> result;
<a name="117" href="#117">117</a>     }
<a name="118" href="#118">118</a> 
<a name="119" href="#119">119</a>     <em class="jxr_javadoccomment">/**</em>
<a name="120" href="#120">120</a> <em class="jxr_javadoccomment">     * @see Arrays#hashCode(char[])</em>
<a name="121" href="#121">121</a> <em class="jxr_javadoccomment">     */</em>
<a name="122" href="#122">122</a>     <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">long</strong> hashCode(<strong class="jxr_keyword">char</strong> a[]) {
<a name="123" href="#123">123</a>         <strong class="jxr_keyword">if</strong> (a == <strong class="jxr_keyword">null</strong>)
<a name="124" href="#124">124</a>             <strong class="jxr_keyword">return</strong> 0;
<a name="125" href="#125">125</a> 
<a name="126" href="#126">126</a>         <strong class="jxr_keyword">long</strong> result = INITIAL_HASH;
<a name="127" href="#127">127</a>         <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">char</strong> element : a)
<a name="128" href="#128">128</a>             result = MULTIPLIER * result + element;
<a name="129" href="#129">129</a> 
<a name="130" href="#130">130</a>         <strong class="jxr_keyword">return</strong> result;
<a name="131" href="#131">131</a>     }
<a name="132" href="#132">132</a> 
<a name="133" href="#133">133</a>     <em class="jxr_javadoccomment">/**</em>
<a name="134" href="#134">134</a> <em class="jxr_javadoccomment">     * @see Arrays#hashCode(byte[])</em>
<a name="135" href="#135">135</a> <em class="jxr_javadoccomment">     */</em>
<a name="136" href="#136">136</a>     <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">long</strong> hashCode(byte a[]) {
<a name="137" href="#137">137</a>         <strong class="jxr_keyword">if</strong> (a == <strong class="jxr_keyword">null</strong>)
<a name="138" href="#138">138</a>             <strong class="jxr_keyword">return</strong> 0;
<a name="139" href="#139">139</a> 
<a name="140" href="#140">140</a>         <strong class="jxr_keyword">long</strong> result = INITIAL_HASH;
<a name="141" href="#141">141</a>         <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">final</strong> byte element : a)
<a name="142" href="#142">142</a>             result = MULTIPLIER * result + element;
<a name="143" href="#143">143</a> 
<a name="144" href="#144">144</a>         <strong class="jxr_keyword">return</strong> result;
<a name="145" href="#145">145</a>     }
<a name="146" href="#146">146</a> 
<a name="147" href="#147">147</a>     <em class="jxr_javadoccomment">/**</em>
<a name="148" href="#148">148</a> <em class="jxr_javadoccomment">     * @see Arrays#hashCode(boolean[])</em>
<a name="149" href="#149">149</a> <em class="jxr_javadoccomment">     */</em>
<a name="150" href="#150">150</a>     <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">long</strong> hashCode(<strong class="jxr_keyword">boolean</strong> a[]) {
<a name="151" href="#151">151</a>         <strong class="jxr_keyword">if</strong> (a == <strong class="jxr_keyword">null</strong>)
<a name="152" href="#152">152</a>             <strong class="jxr_keyword">return</strong> 0;
<a name="153" href="#153">153</a> 
<a name="154" href="#154">154</a>         <strong class="jxr_keyword">long</strong> result = INITIAL_HASH;
<a name="155" href="#155">155</a>         <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">boolean</strong> element : a)
<a name="156" href="#156">156</a>             result = MULTIPLIER * result + (element ? 1231 : 1237);
<a name="157" href="#157">157</a> 
<a name="158" href="#158">158</a>         <strong class="jxr_keyword">return</strong> result;
<a name="159" href="#159">159</a>     }
<a name="160" href="#160">160</a> 
<a name="161" href="#161">161</a>     <em class="jxr_javadoccomment">/**</em>
<a name="162" href="#162">162</a> <em class="jxr_javadoccomment">     * @see Arrays#hashCode(float[])</em>
<a name="163" href="#163">163</a> <em class="jxr_javadoccomment">     */</em>
<a name="164" href="#164">164</a>     <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">long</strong> hashCode(<strong class="jxr_keyword">float</strong> a[]) {
<a name="165" href="#165">165</a>         <strong class="jxr_keyword">if</strong> (a == <strong class="jxr_keyword">null</strong>)
<a name="166" href="#166">166</a>             <strong class="jxr_keyword">return</strong> 0;
<a name="167" href="#167">167</a> 
<a name="168" href="#168">168</a>         <strong class="jxr_keyword">long</strong> result = INITIAL_HASH;
<a name="169" href="#169">169</a>         <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">float</strong> element : a)
<a name="170" href="#170">170</a>             result = MULTIPLIER * result + Float.floatToIntBits(element);
<a name="171" href="#171">171</a> 
<a name="172" href="#172">172</a>         <strong class="jxr_keyword">return</strong> result;
<a name="173" href="#173">173</a>     }
<a name="174" href="#174">174</a> 
<a name="175" href="#175">175</a>     <em class="jxr_javadoccomment">/**</em>
<a name="176" href="#176">176</a> <em class="jxr_javadoccomment">     * @see Arrays#hashCode(double[])</em>
<a name="177" href="#177">177</a> <em class="jxr_javadoccomment">     */</em>
<a name="178" href="#178">178</a>     <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">long</strong> hashCode(<strong class="jxr_keyword">double</strong> a[]) {
<a name="179" href="#179">179</a>         <strong class="jxr_keyword">if</strong> (a == <strong class="jxr_keyword">null</strong>)
<a name="180" href="#180">180</a>             <strong class="jxr_keyword">return</strong> 0;
<a name="181" href="#181">181</a> 
<a name="182" href="#182">182</a>         <strong class="jxr_keyword">long</strong> result = INITIAL_HASH;
<a name="183" href="#183">183</a>         <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">double</strong> element : a) {
<a name="184" href="#184">184</a>             <strong class="jxr_keyword">long</strong> bits = Double.doubleToLongBits(element);
<a name="185" href="#185">185</a>             result = MULTIPLIER * result + (<strong class="jxr_keyword">int</strong>)(bits ^ (bits &gt;&gt;&gt; 32));
<a name="186" href="#186">186</a>         }
<a name="187" href="#187">187</a>         <strong class="jxr_keyword">return</strong> result;
<a name="188" href="#188">188</a>     }
<a name="189" href="#189">189</a> 
<a name="190" href="#190">190</a>     <em class="jxr_javadoccomment">/**</em>
<a name="191" href="#191">191</a> <em class="jxr_javadoccomment">     * @see Arrays#deepHashCode(Object[])</em>
<a name="192" href="#192">192</a> <em class="jxr_javadoccomment">     */</em>
<a name="193" href="#193">193</a>     <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">long</strong> deepHashCode(Object a[]) {
<a name="194" href="#194">194</a>         <strong class="jxr_keyword">if</strong> (a == <strong class="jxr_keyword">null</strong>)
<a name="195" href="#195">195</a>             <strong class="jxr_keyword">return</strong> 0;
<a name="196" href="#196">196</a> 
<a name="197" href="#197">197</a>         <strong class="jxr_keyword">long</strong> result = INITIAL_HASH;
<a name="198" href="#198">198</a> 
<a name="199" href="#199">199</a>         <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">final</strong> Object element : a) {
<a name="200" href="#200">200</a>             <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">long</strong> elementHash = <strong class="jxr_keyword">this</strong>.hashCode(element);
<a name="201" href="#201">201</a>             result = MULTIPLIER * result + elementHash;
<a name="202" href="#202">202</a>         }
<a name="203" href="#203">203</a> 
<a name="204" href="#204">204</a>         <strong class="jxr_keyword">return</strong> result;
<a name="205" href="#205">205</a>     }
<a name="206" href="#206">206</a> 
<a name="207" href="#207">207</a> 
<a name="208" href="#208">208</a>     <em class="jxr_javadoccomment">/**</em>
<a name="209" href="#209">209</a> <em class="jxr_javadoccomment">     * @see Arrays#deepHashCode(Object[])</em>
<a name="210" href="#210">210</a> <em class="jxr_javadoccomment">     */</em>
<a name="211" href="#211">211</a>     <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">long</strong> deepHashCode(Iterable&lt;?&gt; a) {
<a name="212" href="#212">212</a>         <strong class="jxr_keyword">if</strong> (a == <strong class="jxr_keyword">null</strong>)
<a name="213" href="#213">213</a>             <strong class="jxr_keyword">return</strong> 0;
<a name="214" href="#214">214</a> 
<a name="215" href="#215">215</a>         <strong class="jxr_keyword">long</strong> result = INITIAL_HASH;
<a name="216" href="#216">216</a> 
<a name="217" href="#217">217</a>         <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">final</strong> Object element : a) {
<a name="218" href="#218">218</a>             <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">long</strong> elementHash = <strong class="jxr_keyword">this</strong>.hashCode(element);
<a name="219" href="#219">219</a>             result = MULTIPLIER * result + elementHash;
<a name="220" href="#220">220</a>         }
<a name="221" href="#221">221</a> 
<a name="222" href="#222">222</a>         <strong class="jxr_keyword">return</strong> result;
<a name="223" href="#223">223</a>     }
<a name="224" href="#224">224</a>     
<a name="225" href="#225">225</a>     <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">long</strong> hashCode(Map.Entry&lt;?, ?&gt; e) {
<a name="226" href="#226">226</a>         <strong class="jxr_keyword">if</strong> (e == <strong class="jxr_keyword">null</strong>)
<a name="227" href="#227">227</a>             <strong class="jxr_keyword">return</strong> 0;
<a name="228" href="#228">228</a>         
<a name="229" href="#229">229</a>         <strong class="jxr_keyword">long</strong> result = INITIAL_HASH;
<a name="230" href="#230">230</a> 
<a name="231" href="#231">231</a>         <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">long</strong> keyHash = <strong class="jxr_keyword">this</strong>.hashCode(e.getKey());
<a name="232" href="#232">232</a>         result = MULTIPLIER * result + keyHash;
<a name="233" href="#233">233</a> 
<a name="234" href="#234">234</a>         <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">long</strong> valueHash = <strong class="jxr_keyword">this</strong>.hashCode(e.getValue());
<a name="235" href="#235">235</a>         result = MULTIPLIER * result + valueHash;
<a name="236" href="#236">236</a> 
<a name="237" href="#237">237</a>         <strong class="jxr_keyword">return</strong> result;
<a name="238" href="#238">238</a>     }
<a name="239" href="#239">239</a> 
<a name="240" href="#240">240</a>     <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">long</strong> hashCode(Object element) {
<a name="241" href="#241">241</a>         <strong class="jxr_keyword">if</strong> (element == <strong class="jxr_keyword">null</strong> || !register(element)) {
<a name="242" href="#242">242</a>             <em class="jxr_comment">//Return 0 in place of the actual hash code in the case of null or a circular reference</em>
<a name="243" href="#243">243</a>             <strong class="jxr_keyword">return</strong> 0;
<a name="244" href="#244">244</a>         }
<a name="245" href="#245">245</a>         <strong class="jxr_keyword">try</strong> {
<a name="246" href="#246">246</a>             <strong class="jxr_keyword">long</strong> elementHash = 0;
<a name="247" href="#247">247</a>             <strong class="jxr_keyword">if</strong> (element instanceof Object[])
<a name="248" href="#248">248</a>                 elementHash = deepHashCode((Object[]) element);
<a name="249" href="#249">249</a>             <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (element instanceof byte[])
<a name="250" href="#250">250</a>                 elementHash = hashCode((byte[]) element);
<a name="251" href="#251">251</a>             <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (element instanceof <strong class="jxr_keyword">short</strong>[])
<a name="252" href="#252">252</a>                 elementHash = hashCode((<strong class="jxr_keyword">short</strong>[]) element);
<a name="253" href="#253">253</a>             <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (element instanceof <strong class="jxr_keyword">int</strong>[])
<a name="254" href="#254">254</a>                 elementHash = hashCode((<strong class="jxr_keyword">int</strong>[]) element);
<a name="255" href="#255">255</a>             <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (element instanceof <strong class="jxr_keyword">long</strong>[])
<a name="256" href="#256">256</a>                 elementHash = hashCode((<strong class="jxr_keyword">long</strong>[]) element);
<a name="257" href="#257">257</a>             <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (element instanceof <strong class="jxr_keyword">char</strong>[])
<a name="258" href="#258">258</a>                 elementHash = hashCode((<strong class="jxr_keyword">char</strong>[]) element);
<a name="259" href="#259">259</a>             <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (element instanceof <strong class="jxr_keyword">float</strong>[])
<a name="260" href="#260">260</a>                 elementHash = hashCode((<strong class="jxr_keyword">float</strong>[]) element);
<a name="261" href="#261">261</a>             <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (element instanceof <strong class="jxr_keyword">double</strong>[])
<a name="262" href="#262">262</a>                 elementHash = hashCode((<strong class="jxr_keyword">double</strong>[]) element);
<a name="263" href="#263">263</a>             <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (element instanceof <strong class="jxr_keyword">boolean</strong>[])
<a name="264" href="#264">264</a>                 elementHash = hashCode((<strong class="jxr_keyword">boolean</strong>[]) element);
<a name="265" href="#265">265</a>             <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (element instanceof Class&lt;?&gt;)
<a name="266" href="#266">266</a>                 elementHash = getHashCode((Class&lt;?&gt;)element);
<a name="267" href="#267">267</a>             <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (element instanceof Number)
<a name="268" href="#268">268</a>                 elementHash = getHashCode((Number)element);
<a name="269" href="#269">269</a>             <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (element instanceof Enum&lt;?&gt;)
<a name="270" href="#270">270</a>                 elementHash = getHashCode((Enum&lt;?&gt;)element);
<a name="271" href="#271">271</a>             <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (element instanceof Iterable&lt;?&gt;)
<a name="272" href="#272">272</a>                 elementHash = deepHashCode((Iterable&lt;?&gt;)element);
<a name="273" href="#273">273</a>             <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (element instanceof Map&lt;?, ?&gt;)
<a name="274" href="#274">274</a>                 elementHash = deepHashCode(((Map&lt;?, ?&gt;)element).entrySet());
<a name="275" href="#275">275</a>             <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (element instanceof Map.Entry&lt;?, ?&gt;)
<a name="276" href="#276">276</a>                 elementHash = hashCode((Map.Entry&lt;?, ?&gt;)element);
<a name="277" href="#277">277</a>             <strong class="jxr_keyword">else</strong>
<a name="278" href="#278">278</a>                 elementHash = getHashCode(element);
<a name="279" href="#279">279</a>             <strong class="jxr_keyword">return</strong> elementHash;
<a name="280" href="#280">280</a>         }
<a name="281" href="#281">281</a>         <strong class="jxr_keyword">finally</strong> {
<a name="282" href="#282">282</a>             unregister(element);
<a name="283" href="#283">283</a>         }
<a name="284" href="#284">284</a>     }
<a name="285" href="#285">285</a>     
<a name="286" href="#286">286</a>     <em class="jxr_javadoccomment">/**</em>
<a name="287" href="#287">287</a> <em class="jxr_javadoccomment">     * Generate hash code for an Class which by default uses object identity hash codes</em>
<a name="288" href="#288">288</a> <em class="jxr_javadoccomment">     */</em>
<a name="289" href="#289">289</a>     <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">long</strong> getHashCode(Class&lt;?&gt; c) {
<a name="290" href="#290">290</a>         <strong class="jxr_keyword">return</strong> c.getName().hashCode();
<a name="291" href="#291">291</a>     }
<a name="292" href="#292">292</a>     
<a name="293" href="#293">293</a>     <em class="jxr_javadoccomment">/**</em>
<a name="294" href="#294">294</a> <em class="jxr_javadoccomment">     * Generate hash code for a Number, getting the more precise long value.</em>
<a name="295" href="#295">295</a> <em class="jxr_javadoccomment">     */</em>
<a name="296" href="#296">296</a>     <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">long</strong> getHashCode(Number n) {
<a name="297" href="#297">297</a>         <strong class="jxr_keyword">return</strong> n.longValue();
<a name="298" href="#298">298</a>     }
<a name="299" href="#299">299</a>     
<a name="300" href="#300">300</a>     <em class="jxr_javadoccomment">/**</em>
<a name="301" href="#301">301</a> <em class="jxr_javadoccomment">     * Generate hash code for an Enum, uses a combination of the Class and name to generate a consistent hash code</em>
<a name="302" href="#302">302</a> <em class="jxr_javadoccomment">     */</em>
<a name="303" href="#303">303</a>     <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">long</strong> getHashCode(Enum&lt;?&gt; e) {
<a name="304" href="#304">304</a>         <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">this</strong>.hashCode(<strong class="jxr_keyword">new</strong> Object[] { e.getClass(), e.name() });
<a name="305" href="#305">305</a>     }
<a name="306" href="#306">306</a>     
<a name="307" href="#307">307</a>     <em class="jxr_javadoccomment">/**</em>
<a name="308" href="#308">308</a> <em class="jxr_javadoccomment">     * Generate hash code for an object</em>
<a name="309" href="#309">309</a> <em class="jxr_javadoccomment">     */</em>
<a name="310" href="#310">310</a>     <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">long</strong> getHashCode(Object o) {
<a name="311" href="#311">311</a>         <strong class="jxr_keyword">return</strong> o.hashCode();
<a name="312" href="#312">312</a>     }
<a name="313" href="#313">313</a> }
</pre>
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